<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script type="text/javascript">
			//在浏览器中设置断点进行调试 
			alert(d);
			
			var a = 10;
			var b = "hello";
			c = true;
			function fun(){
				console.log("hello");
			}
			var d = 35;
		</script>
	</head>
	<body>
	</body>
</html>
